Shear mechanism



E. M. HAWKINS.

SHEAR MECHANISM.

APPLICATION FILED MAY I6. I9I8.

1 32 1 ,207 Patented N av. '11, 1919.

4 SHEETS-SHEET I IN VENTOR.

.4 TTORN E Y.

E. M. HAWKINS;

SHEAR MECHANISM.

APPLICATION FILED MAY16, ISIB.

Patented Nov. 11, 1919.

4 SHEETSSHEET 2.

:IIIIIIIIIIIII I [N 1' 'EN TOR A TTORNIZY.

E. M. HAWKINS.

SHEAR MECHANISM. APPLIICIIATION FILED MAY 16. 1913.

1,321,207. Patented Nov. 11, 1919 4 SHIEETS-SHEET a.

r r 17% j WITNESS:

/f 1M ATTORNEY.

EIM. HAWKINS. U

SHEAR MECHAMSM.

. APPLICAHGN FILED MAYm. 191a.

Patehted Nov. 11, 1919.

4 SHEETSSHEET 4.

INVENTOR ATTORNEY.

UNITED STATES PATENT OFFICE.

EDGAR M, HAWKINS, OF ROCHESTER, NEW YORK, ASSIGNOR TO M. D. KNOWLTON COMPANY, OF ROCHESTER, NEI/V YORK, A CQRPORATIQN OF NEW YORK.

SHEAR MECHANISM.

Application filed May 16,

To all whom it may concern:

Be it known that I, Enean M. HAWKINS, 'a citizen of the United States,'and resident of Rochester, in the county of Monroe and State of New York, have invented certain new and useful Improvements in Shear.

the movement of the web before the cutting operation. This is accomplished in the machine of the aforesaid application by mounting the shear blades for movement paralle with the movement of the web and providing actuating means for imparting movement to the shear blades during the cutting action so that said shear blades will move with the web during the cutting action.

In the machine of the'aforesaid application the upper or vertically movable shear blade is mounted for reciprocation in guideways on the horizontally sliding frame which carries the shear blades. In the present case, however, and in accordance with my invention, I pivotally mount the upper shear blade on said sliding frame so that it will have a swinging or oscillating movement to and from its cutting position relative to the lower or stationary blade, and provide actuating means that will act to both oscillate said upper blade and move the sliding frame so that the shear blades thereon will move with the web during the cut ting operation. By mounting and operating the upper blade in this wayI am enabled to provide a shear mechanism of fewer parts and less weight than that of the aforesaid application and one that is capable of substantially greater speed, which is an important desideratlnn in machines of the class on .which the present shear mechanisnris espeeially intended for use.

Specification of Letters Patent.

Patented Nov. 11, 1919.

1918. Serial No. 234,888.

I The invention is illustrated in the accompanying drawings, in which 4 Figure l is a longitudinal vertical section through part of a machine of the type referred to, equipped with-a shear mechanism embodying my invention;

Fig. 2 is a top plan of the shear mechanism shown in Fig. 1;

Fig. 3 is an enlarged vertical section taken on thr; line 3-3 of Fig. 1, looking.in the direction indicated by the arrows; F ig. 4 is an enlarged 'detail of part of a trip mechanism for controlling the opera tion of the shear mechanism; Fig. 5 is a similar view looking from the right as viewed in Fig. at; and

Figs. 6 and 7 are details of said trip mechanism to be hereinafter referred to.

Referring to thedrawings and particularly to Figs-1, 2 and 3, it will be noted that a lower cutter bar 60 is provided, which extends transversely of the machine and is mounted at its ends in shear frames 61, there being one of such shear frames at each side of the machine as shown in F ig. 2. The. cutter bar 60 carries a shear blade 62 with which the upper shear blade 63 coiiperates, the latter being carried by a swinging or oscillating frame 64. Y

The frame 64is here shown as being substantially. U-shape, with thecentral or cutter-carrying portion of the same extending transversely of the machine and with its opposite arms 65 journaled on fulcrum studs 66 attached to the shear frames 61, as'best. shown in Fig. 2.

The two shear frames 61, together with i the shear blades and their supports including the pivoted frame for the upper blade, -are mounted for movement as a unit lorflgitudinally of the machine, andfor this purpose. the shear framcs'fil' are mounted upon provided with crank pins 68, the latter being connected directly with the ends of the,

arms 65 of the upper cutter carrying frame Rotation of this crank shaft 9 will oscillate the cutter frame 64 about its'fulcrum supports to lower and raise the suppbrted shear blade to andfrom its cutting position relative to the lower blade, and also impart a horizontal reciprocating motion to the shear frames by reason of the connection of the cutter frame (Bl therewith at the fulcrum points 66. It will be noted that when the crank pins 68 rotate from the position shown in Fig. 1 in an anti-clockwise direction, the shear frames, together with the upper and lower shear blades, will move to the left in Fig. 1, which, as'will hereinafter appear, is the same direction in which the Web of material passes between the shear blades. Approximately at the time when the shear frames attain their maximum speed and are moving at about the same speed as the web of material, the cutting action will take place. This is due to the fact that the cutting action takes place when the crank pins 68 are at approximately their highest points, and at this time also the shear frames are moving at their maximum speed. The second half of each revolution of the crank pins 68- will, of course, return the shear frames to their normal position and return the upper shear blade to its raised position.

The-means here shown for actuating the crank shaft 9 is substantiallv the same as that disclosed in the aforesaid application,

to which referiice may be-had. This means, briefly described, comprises an actuating shaft 7'2 which is geared to the shaftjby the meshing gears 7 3 and 74 carried by: the actuating shaft and the crank shaftre'spectively. The rotation of the actuating shaft 72 is controlled by a friction clutch, the 'two members of which are shown at .75 and 76. The cone member 75 is keyed ito the actuating shaft 72 but is mounted -to slide thereon, while the clutch member 7 6, which constitutes the driving member, is mounted to rotate freely upon the extremity of the shaft 72'.

. The construction of the actuating means for controlling the engagement of the clutch members 75 and 7 6 will depend largely upon the relation in which the shear mechanism is used. In the present instance, the engagement and-disengagement of the clutch members. are adapted to be controlled by a sheet trip. The crank shaft is thus set in operation. and is allowed to make one complete revolution, at which time the clutch members are thrown out oi engagement by the means to be presently described. Before the sheet trip andlliis means for tlu owing out of engagement the clutch members are described, it should be mentioned that the webof material is positively fed to the shear,

mechanism by suitable feeding means which, as here shown, includes a pair of feed rolls 77, 77.

The sheet trip here shown for automatically controlling the operation of the shear mechanism, is that disclosed in the co-pending application of Otto M. Hoch, Serial No. 161,379, filed April '1-1, '1917, to which reference may be This shet trip which is here designated generallyby the-re er'ence. character S, is adapted to be actuated by the forward edge-of themoving vreb of material to effect operationjof the shearjinechanism by causing engagement fthe clutch members. The clutc lijhere shown in -the aforesaid-application, controlled -'-aclutch; rod 1, which rod is pivoted at 2, ontan armtl. This arm 3 is secured to a shaftx t which' supported in a bracket 5 carried" bythei frame of the machine. Mounted loosely on the shaft i is a cam lever 6' which carries-hf; roller 7 at its a per or free end. This. roller 7 is adapted ib with a canio which is provided withliigh and low por-" tions, as illustrated in-Fig. 30f the drawl, ings, and is mounted on the crank shaft 9," wl ich shaft is actuated by the engagement I of the clutch members as hereinbefore re 96 ferred to. This cam roller 7 is norn'ially maintained in engagement with the surface of the cam by a spring 10 which is secured to the cam lever and to a stationary portion of the frameat 11. An arm '12 is secured to the, shaft ,4 and carries at its'upper end,"a PlLOtBd PQWl 13 which is arranged to en gage a weer-block 14 on the cam'lever 6,-as

isc-losed in Fig. 3. This pawl 13 is adapted to be moved out of engagement with saidlloO wear-block 14 by a'rod 15 which is Secured to the pawl and has a lost motion connection at 16 with analim 17 carried by and-rigid with-a shaft 18, which shaft is mounted' in suitable brackets 19 on the frame of the 'machine: A second arm 20 extends from this shaft 18 and is connected to a bell crank lever 21 by means of a connecting link "22.':

This lever 21 is attachedto a crank arm which is mounted rigidly on an oscillatoiy 1 10 shaft 24, by meansof a connecting rod l'fl'fi; This shaft 24- is carried by the trip casin S, as disclosed in Fig. 4 of the drawings. The

rod 25 passes through a bracket 26 and is provided with a collar 27, betweenwhich collar and bracket a coil spring 28 is mountedand surroundsthe rod 25, which spring, when relieved of its confinement, moves the rod '25, and, through the 'connect'ing ale-- IIlBlliL$,'llftS the pawl 13 from engagement with the wear-block .14. Thus, when the shaft E i-is permitted to oscillateso that the arm 23 thereon will move to the left in Fig. 7 under the action of the spring 28, the pawl 13 wili be lifted from its engagement with the. block 14 and the clutch rod 1 permitted to more under theinfluence of its actuating spring (not shown) to cause engagement oit-he'. clutch members so that the Shearing mechanism Wlll be actuated.

In order that the parts may be reset and the spring 28 again placed under compression, a cam lever 29 is loosely mounted on the shaft 4': and provided with a roller 30,

which is normally maintained in engagementwith the face of tllflhflln 8 by a spring .on the high portion of the cam 8 will cause the downward movement of the link 33, and the consequent reengagement of the pawl 13 with the wear-block 14, and. the placing of the spring 28 under compression, so that it Will be ready for a subsequent operation. In order that the rod 25 may be permitted to move at the proper times to causethe interenga'g'einent of the members of the clutch, and the consequent opeiration of the shear-- ing mechanism, the sheet trip, which has beenpreviously referred to and designated by the reference character S, is provided. This trip includes a casing, which, as aforesaid, supports the shaft 2t and which adjustably mounted on a graduated tube 3- A trip lever 39 is pivoted on a shaft -10 on the trip casing and is provided With fingers at its lower end which are raced with wear-plates 41, which fin 'ers extohd through slots in the stripper 42., The lower end of the trip lever 39lies in the path of movement of the web of material which passes beneath the strip per 42, and h which latter, the upper liner of the web, when the latter is corrugatedboard. is prevented from curling. This lower end of the trip lever 39 is maintained in its forwardposition by means of a spring 45 which is attached to an arm t? on the lever and forces the lower end of the lever into engagen'ient with a stop 47 on the casing. Pivoted loosely on the shaft 4-0 is a latch 48, which is of angular form, and is provided with an extending portion arranged to engage alatch 'arm 48. which is keyed to the shaft 2%. so that it will oscillate with the latter, but so that it will move with the casinp and with relation to the shaft. This latch arm 48 is provided at its lower end with a shoe 4 for a purpose which will later become apparent. The latch 48 is normally held in the path of movement 01 'the latch arm 4F? so that the movement of the latter, under the influence of the spring 28, is prevented, by a spring 50. 'A pawl 51 is piyoted'to an extension of the trip lev r 39,-vand the upper end of this paw] is norma y held in engagement-with a notch in the adjacent end of the latch 48 by a spring 53. Thus, When'the trip lever 39 is n'ioved against the action of the-spring 45 by the moving web of material, the pawl 51 will likewise be moved, and because of its engagement with the latch -48, will cause the latter to pass from the path of movement of the latch arm'ifi, that the sprin will be free to operate until the niovement of the latch arm i8 is arrested by a stop 55. This engagement of the iawl 51 and the latch 48 is maintained until the tail of the pawl contacts with a stop 54, at which time the pawl will be forced out of engagement with the notch in the latch :8, and the spring 50 will move the end of the latch 1-?! into engagement with the lower cam face oi" the shoe if). so that upon the movement oi the rod in the opposite direction. and the consequent rotation of the shaft 24, the latch 48 will again be permitted to assume its original position and prevent the movement of the latch arm 48' until again released by the trip lever il' hile the operation of the trip mechanism so far described is thought to he clear from the preceding description, a brief summary is here given. When the web of material is fed beneath the stripper 42 and engages the trip lever 3-, it moves the'latter rearivartlly, and upon such movoi'nent, the latch 48 is dis igaged from the latch arm 48'. Immedi ly upon such disengagement, the engagement oi the tail of the pawl 51 with the stop 53-1 dis-engages the'paw] from the notcli'in the latch 445 and permits the spring 50 to force the latch into engagement with the shoe 49 of the latch arm 48. hen the latch arm 43 released, the spring moves the rod and through the connecting elements disengages the pawl 13 from the wear-block on the cam lever 6, thus permitting the clutch spring (not shown) to operate and engage the clutch inei'nhers. The engagement of these clutch members causes the rotation of the cam F, and when this cam has completed a half revolution and the cam lever 25) moves to the high portion of the cam, the spring 28 is again put under com 'iiession and the pawl 13 recngaged through the arm 32 and the related elements. The latch arm i8 at this time moves to its initial position and the latch 4-8 again prevents it moveu'ient until the trip lever is subsequently actmitcd.

What I claim is:

1. Shear mechanism tor cutting a web of moving inater'ah comprising a frame slidable in a direction parallel to the moven'lent of the material. a cutter stationary with. the frame, a cutter frame pivoted to the slidable frame, a cutter carried by the cutter frame "at one'side of its pivotal axis, the ends of said frame extending to the opposite side of the pivotal axis a crank shaft connected to said extended ends, and [means for actuating the crank shaft. I

Shearmechanism for cutting a web of moving material, comprising a stationary of said cutter frame, the legs ofsaid cutter frame being extended beyond ts pivotal.

axis, and a crank shaft mounted on the first mentioned frame, and connected to the extended ends of the cutter irame.

3. Shear mechanism for cutting e Web of moving material, comprising a slidable frame, a cutter blade carried by the slidable frame, a U-sheped cutter frame pivoted to the slidable frame, a cutter carried by the bight portion of said Ushaped frame, the legs of said frame extending beyond the pivotal axis thereof, and means connected to said extended ends for oscillating the L!- shaped frame and reciprocating the slidable frame.

Shear mechanism for cutting a web of mowng material, comprising a slideble frame, a cutter carried thereby, a miner frame pivoted to the slida'hle frame, a cut-- ter carried by the cutter frame, the ends of the cutter frame extending be; end the piv0-- tal axis thereof, means connected to said ends for reciprocating the elidable frame and oscillating the cutter frame, and means for rendering the aforementioned means inoperative after each complete reciprocation of the slidable frame and each complete osci'iletlon of the cutter frame. I

Signed at Rochester, 1n the county of Monroe, and State of New York, this 13th day of May A. D. 1918.

EDGAR M. HAWKEXS. Witnesses THQS. D. Barron HUBERT J. Il LXRTIN. 

